Popiela, Agnieszka, Dorota Nalepka, and Andrzej Łysko. 2011. “Analysis of Distribution Patterns of Selected Ephemeral Wetland Species in Western Pomerania (NW Poland, NE Germany)”. Biodiversity: Research and Conservation 19 (July):55-64. https://doi.org/10.2478/v10119-010-0021-3.